Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 611C402-21 found under Ring Gear Slip by Timken Gears And Services Inc. The National Stock Number assigned to this part is 2010003505774, and the Federal Supply Class is 2010 Ship And Boat Propulsion Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 611C402-21.